High Temperature Probe

Measures remaining metal thickness from 1.5 - 250 mm on hot surfaces up to 300ºC, making it ideal for high-temperature, in-service thickness measurements and corrosion surveys applications - across oil & gas, refining, energy and process industries.

This High Temperature, twin element, ultrasonic probe has been designed for high-temperature, in-service thickness measurements and corrosion surveys applications – across oil & gas, refining, energy and process industries.

  • For use on hot surfaces up to 300 degrees C
  • No cooling period required, reducing inspection time and facilitating effective measurement
  • Measures remaining wall thickness from 1.5 – 250 mm, depending on temperature and material.

High-Temperature Probe

At Cygnus Instruments, we take immense pride in our 40+ years of experience as pioneers in the field of ultrasonic technology. When it comes to high-temperature probes, you’ve come to the right place. Our expertise lies in developing cutting-edge digital multiple echo technology, making us leaders in the industry. 

Whether you require precision temperature measurements or ultrasonic thickness gauges for a variety of applications, our global presence ensures that we can meet your needs. What sets us apart is our highly trained team of experts, dedicated to providing you with the most reliable solutions. If you’re seeking high-temperature probes, look no further. Contact us on +65 6252 5909, and let’s discuss how we can assist you. 

Your Go-To High-Temperature Probe Specialists 

High-temperature probes play a pivotal role across diverse industries, offering unparalleled accuracy and safety in the face of extreme heat. But what exactly are these remarkable devices, and how do they perform under such challenging conditions? In this comprehensive exploration, we delve into the intricacies of high-temperature probes, unveiling the secrets behind their design and operational prowess. 

Discover the extraordinary engineering that enables these robust instruments to endure scorching temperatures while delivering precise measurements. Furthermore, we shine a spotlight on Cygnus Instruments‘ cutting-edge high-temperature probes, showcasing the innovative technology that sets us apart. 

Join us in unravelling the science behind these exceptional tools, as we illuminate their indispensable role in safeguarding the integrity of critical operations. When it comes to temperature measurement, Cygnus Instruments stands at the forefront of innovation and reliability. 

What is a High-Temperature Probe? 

A high-temperature probe is a bespoke instrument crafted to endure extreme thermal conditions, ensuring that precise temperature measurements are maintained with unparalleled accuracy. These temperature probes are built with an unwavering emphasis on durability, making them indispensable across a plethora of sectors where temperatures fluctuate dramatically. 

Notably, our ultrasonic probes, specifically designed for gauging wall thickness in high-heat environments, stand out for their application-specific utility. Their unmatched prowess in navigating demanding test scenarios guarantees the collection of trustworthy temperature data, even under the most severe conditions. 

These temperature probes find extensive application in industrial domains, aerospace, and any sphere where temperature significantly impacts operations. A robust high-temperature probe’s resilience against harsh environments, coupled with its capacity to deliver precise temperature readings, renders it an essential asset for professionals aiming for reliable and consistent outcomes in their temperature measurements and testing endeavours. 

How Do High-Temperature Probes Work? 

Our high-temperature probes have earned their reputation as indispensable instruments across a myriad of testing scenarios. These sophisticated devices harness the formidable power of ultrasonic technology, a non-intrusive technique celebrated for its remarkable accuracy and adaptability. 

During operation, our probes dispatch high-frequency sound waves into the subject material. These waves permeate the material and are reflected back to the probe’s highly sensitive sensor. By precisely gauging the duration for the waves’ return journey, our probes deduce the material’s thickness with exceptional accuracy. 

This method proves especially efficacious for appraising materials subjected to elevated temperatures, guaranteeing unparalleled dependability under the most strenuous conditions.  

With Cygnus Instruments’ high-temperature probes at your disposal, you can trust in precise outcomes for your testing requisites, even when operating in the most demanding high-temperature environments. 

Introducing the High Temperature Ex Probe 

Cygnus Instruments proudly offers a high-temperature in-service probe that seamlessly integrates with our ultrasonic thickness gauges. Explore the capabilities of the Cygnus High-Temperature Ex Probe below. 

Basic Information 

Our High-Temperature Ex Probe is the ultimate companion for the Cygnus 1 Ex ultrasonic thickness gauge. Tailored exclusively for high-temperature environments, this cutting-edge probe enables continuous measurements on hot surfaces, eliminating the need for time-consuming cooling intervals. By doing so, it not only accelerates your inspection process but also elevates the precision of your measurements. 

To ensure longevity and reliability, this probe is engineered to be used with a specialised probe cable. This cable is further reinforced with a resilient glass-fibre outer braid, providing an additional layer of protection. What sets us apart is the flexibility we offer – the probe and probe cable are sold separately, ensuring cost-effective replacement options that suit your unique requirements. 

When it comes to high-temperature testing, trust our probe to meet and exceed your expectations, making it an invaluable addition to your equipment arsenal. 


Our high-performance T5BH-Ex temperature probe stands as a testament to our commitment to excellence in extreme conditions. Crafted with durability in mind, this robust probe is the perfect companion for precision temperature measurements on scorching surfaces, effortlessly handling temperatures of up to 300 degrees Celsius. 

Key Features: 

  • Frequency Crystal Ø: 5.0 MHz 
  • Tip Size: 12 mm (0.47 in) Nominal 
  • Range in Steel: 2.5 – 50 mm (0.1 – 1.97 in) 
  • Connectors: Twin Microdot 10-32 
  • Surface Temperature Range: 50°C to 300°C (122°F to 572°F) 

Say goodbye to temperature-related testing challenges, as our T5BH-Ex excels in surface temperature ranging from 50°C to 300°C (122°F to 572°F). Whether you’re in heavy industry or research, rely on Cygnus Instruments to provide you with the tools you need for accurate and consistent temperature measurements in even the most demanding environments. 

Suitable Applications 

These probes truly shine in environments characterised by extreme heat, making them indispensable for tasks such as furnace and boiler inspections. They are equally adept at conducting heat exchanger assessments, safeguarding the reliability of vital components within power plants and chemical facilities. 

In the aerospace sector, our probes play a crucial role in non-destructive testing, ensuring the durability of materials subjected to high temperatures during flight. Whether it’s assessing structural integrity or monitoring heat-related processes, our high-temperature probes stand as trusted companions, delivering precise and dependable results. 

Industries and Testing Scenarios: 

  • Furnace and Boiler Inspections 
  • Heat Exchanger Assessments 
  • Aerospace Non-Destructive Testing 

With Cygnus Instruments, you have a dependable partner for accurate and reliable high-temperature probe solutions. 

Why Purchase Ultrasonic Thickness Equipment from Us?  

Cygnus Instruments, a UK-based company, boasts over 40 years of expertise in Non-Destructive Testing (NDT) for ships and maritime vessels. Our global leadership in ultrasonic testing (UT) equipment spans diverse industries. 

Our early focus on rugged, user-friendly units for ship surveyors and divers endures. Our products are renowned for robustness, excelling in challenging environments, prioritising reliability, accuracy, and ease of use. 

Innovation is our hallmark, having pioneered the “Multiple Echo” UT technique, adopted by major Classification Societies. We deliver cutting-edge inspection equipment. Customer feedback and R&D drive our comprehensive range of UT solutions for hazardous locations, ship hull surveys, underwater inspections, asset integrity management, and specialised testing. 

ISO-9001 certification and intrinsically safe certifications (EX Veritas and CSA) guarantee exceptional quality. 

Contact Us Now to Learn More About Our Products 

If you’re ready to explore the world of high-temperature probes further, we’re here to assist you. You can reach out to our team directly on +65 6252 5909 to discuss your specific requirements. Alternatively, feel free to drop us an email at sales@cygnus-instruments.sg, and we’ll get back to you promptly. 

We also offer the convenience of a contact form on our website, making it easy for you to share your needs and questions with us. Whether you prefer a phone call or written communication, we’re eager to connect and provide you with the expertise you require for high-temperature probes. Get in touch with us today! 

Used to measure remaining metal thickness of high-temperature and in-service assets without shutdown or isolation, this High Temperature Probe can be used with the following thickness tester:

  • Cygnus 4+ General Purpose with A-scan display and sequential data logging for easy reporting and analysis
  • Cygnus 6+ PRO with A-scan and B-scan display, comprehensive data logging, temperature compensation feature, plus much more.

Temperature Probe Cables

There are 2 types of cables that can be used with the high temperature probe – the standard cable or the more robust, braided cable:


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